NyQuil

Vicks NyQuil is a brand of over-the-counter medication manufactured by Procter & Gamble intended for the relief of various symptoms of the common cold. All medications within the NyQuil imprint contain sedating antihistamines, hypnotics, or alcohol, and are intended to be taken before sleep. Its daytime counterpart is antihistamine free DayQuil, formulated to avoid drowsiness. NyQuil is also used as sleep aid. NyQuil was first marketed in the United States in 1966. Its name may be a portmanteau of nighttime tranquility.